THE DIPOLE POLARIZABILITY OF ZN-L RYDBERG LEVELS OF ZN( AND THE HIGH)

An accurate 1-electron model of Zn+ is developed and used to evaluate the long-range asymptotic form of the polarisation potential for an el ectron interacting with a Zn+ 'core' up to terms of order r(-8). The s tatic dipole polarisability of Zn+ is calculated to be 16.7 au, in goo d agreement with an effective experimental value derived from observed zinc 4snf term values. Radiative lifetimes for 4p(1/2,3/2) resonance levels and several other excited levels of Zn+ are also calculated. En ergies of 4snl Rydberg levels of Zn for l = 3 and 4 and n up to 26 are evaluated in first- and second-order perturbation theory; the 4snf en ergies are in accord with a recent measurement.